CN201594590U

CN201594590U - Waterproof air-breathing grounding pole

Info

Publication number: CN201594590U
Application number: CN2009201280269U
Authority: CN
Inventors: 胡良俊
Original assignee: Chongqing Jinmei Communication Co Ltd
Current assignee: Chongqing Jinmei Communication Co Ltd
Priority date: 2009-07-14
Filing date: 2009-07-14
Publication date: 2010-09-29
Anticipated expiration: 2019-07-14

Abstract

The utility model discloses a waterproof air-breathing grounding pole comprising a stud A, a stud B, a waterproof air-breathing material layer, an electromagnetic compatible dustproof metal layer, an O-shaped sealing ring, a screw cap, a grounding solder piece, a nut and an elastic pad, wherein one end of the stud B is a thread and the end surface of the other end thereof is provided with a round groove; the waterproof air-breathing material layer and the electromagnetic compatible dustproof metal layer are sequentially paved on the bottom surface of the round groove; one end of the stud A is the thread and the bottom surface of the other end thereof is provided with a through hole which is communicated with the air-breathing hole of the thread; the tight fitting and pressing-in operations are carried out on the stud A and the stud B; furthermore, the round groove is formed at one end of the stud B; the O-shaped sealing ring is paved on the bottom surface of the round groove so that the thread end of the stud A is air-sealed with the installation surface; the grounding solder piece, the elastic pad and the nut are sequentially arranged in the thread end of the stud A; and the screw cap is arranged in the thread end of the stud B. The waterproof air-breathing grounding pole has the benefits of good waterproof (aqueous vapour) performance, dustproof performance, electromagnetic radiation resistance, electric leakage and static charge resistance and good bidirectional air-breathability, and can breathe quickly and lead the protection on the equipment to achieve IP68 grade.

Description

The waterproof and breathable earthing rod

Technical field

The utility model relates to the waterproof and breathable earthing rod of device, especially sealing electronic device, hermetically-sealed instrument, airtight container and the sealed cell case of a kind of waterproof, ventilative, safety ground.

Background technology

For the airtight equipment of some housing, owing to enclosure interior gas expands, pressure increases during equipment work, very easily produces following several phenomenons: 1, housing distortion expansion (otherwise, when external temperature is higher, can cause the housing depression) even the material fracture; 2, enclosure interior forms water smoke, and shield glass inner surface water smoke has a strong impact on product and uses, and the enclosure interior condensation can corrode electronic devices and components and metal surface; 3, the obvious chimb of PCV key film, the local weakness of sealed product can leak air and cause equipment to occur leaking; 4, have a strong impact on enclosure interior electronic devices and components useful life; 5, airtight housing produces explosion; 6, the housing back that meets accident occurs having static in electric leakage, the work, and electric leakage, static is hurted sb.'s feelings and damage equipment.

Summary of the invention

Based on the practical problem of addressing in the background technology, the utility model proposes a kind of waterproof and breathable earthing rod, its structure comprises: double-screw bolt A (1), double-screw bolt B (2), waterproof ventilative material layer (3), the dustproof metal level (4) of electromagnetic compatibility, O RunddichtringO (5), nut (6), ground connection weld tabs (7), nut (8) and bullet pad (9); Double-screw bolt B (2) one ends are screw thread, and other end end face has a circular groove, and groove floor and end of thread end face form through hole, and through-hole aperture is less than the circular groove diameter; Waterproof ventilative material layer (3), the dustproof metal level (4) of electromagnetic compatibility are laid on the circular groove bottom surface in turn; Double-screw bolt A (1) one end is a screw thread, and 4 air-vents are arranged on the screw thread, and the diameter in hole is much smaller than the double-screw bolt diameter, and other end bottom surface has a through hole to link to each other with air-vent, and its end face diameter is greater than the end face diameter of double-screw bolt B (2); Double-screw bolt A (1) and double-screw bolt B (2) are carried out compression fit be pressed into, waterproof ventilative material layer (3), the dustproof metal level (4) of electromagnetic compatibility are fixed, and form circular groove at the end of double-screw bolt B (2); O RunddichtringO (5) is laid on the circular groove bottom surface, makes the end of thread and the installed surface of double-screw bolt A (1) airtight; Pack into the successively end of thread of double-screw bolt A (1) of ground connection weld tabs (7), bullet pad (9), nut (8); Pack into the end of thread of double-screw bolt B (2) of nut (6).

Useful technique effect of the present utility model is: waterproof (aqueous vapor), dustproof, anti-electromagnetic radiation, and anticreep and static, two-way good permeability, ventilating fast can reach the IP68 level to the protection of equipment.

Description of drawings

Fig. 1, the utility model section of structure;

Fig. 2, waterproof ventilative material layer, the dustproof metal level of electromagnetic compatibility and double-screw bolt B scheme of installation;

Fig. 3, double-screw bolt A and double-screw bolt B scheme of installation;

Fig. 4, nut, O-ring seals, weld tabs, bullet pad and nut scheme of installation;

Fig. 5, " waterproof and breathable earthing rod " operation principle schematic diagram.

Embodiment

Referring to Fig. 1,, the utility model proposes a kind of waterproof vent valve at the deficiencies in the prior art, its structure is: double-screw bolt B (2) one ends are screw thread, other end end face has a circular groove, and groove floor and end of thread end face form through hole, and through-hole aperture is less than the circular groove diameter; Lay a waterproof ventilative material layer (3) earlier in the circular groove bottom surface, go up at waterproof ventilative material layer (3) again and lay the dustproof metal level (4) (referring to Fig. 2) of an electromagnetic compatibility; Double-screw bolt A (1) one end is a screw thread, and 4 air-vents are arranged on the screw thread, and the diameter in hole is much smaller than the double-screw bolt diameter, and other end bottom surface has a through hole to link to each other with air-vent, and its end face diameter is greater than the end face diameter of double-screw bolt B (2); Double-screw bolt A (1) and double-screw bolt B (2) are carried out compression fit be pressed into, waterproof ventilative material layer (3), the dustproof metal level (4) of electromagnetic compatibility are fixed, and form circular groove (referring to Fig. 3) at the end of double-screw bolt B (2); Lay one deck O RunddichtringO (5) in the circular groove bottom surface that forms, make the end of thread and the installed surface of double-screw bolt A (1) airtight; Pack into the successively end of thread of double-screw bolt A (1) of ground connection weld tabs (7), bullet pad (9), nut (8); Pack into the end of thread of double-screw bolt B (2) of nut (6).(referring to Fig. 4)

Operation principle: referring to accompanying drawing 5, box closed shell as shown in the figure, the waterproof and breathable earthing rod is threaded with housing, junction (installed surface) is airtight by O RunddichtringO (5), ground connection weld tabs (7) is connected with product ground wire or casing, outside weld tabs is connected (referring to Fig. 5) with copper cash with earth potential, enclosure interior is passed through the through hole of double-screw bolt B (2) end of thread end face and is communicated with external environment with air-vent on double-screw bolt A (1) screw thread.During equipment work, the enclosure interior temperature raises, and air pressure inside is greater than external pressure, and the air in the housing just flows to outside by the waterproof and breathable earthing rod, and the original a small amount of aqueous vapor of enclosure interior is discharged (further dehumidifying) by waterproof and breathable composite bed (4) outside machine; When equipment is not worked (or ambient temperature is higher than the enclosure interior temperature), gas can flow to enclosure interior from external environment, and airborne aqueous vapor is isolated by the waterproof ventilative material layer (3) of waterproof and breathable earthing rod, plays the purpose of waterproof; The environmental work that if equipment is more at some dust or salt fog is dense, the electromagnetic compatibility metal level (4) that prevents dust has just played a role, the electromagnetic compatibility metal level (4) that prevents dust can stop that outside granule foreign enters in the housing, has also played the certain protection effect to waterproof ventilative material layer (3); The electromagnetic compatibility metal level (4) that prevents dust has also played the effect of magnetic screen at opening part to enclosure interior, prevents that external electromagnetic interference from influencing equipment and normally moving; When electric leakage, static appear in equipment, introduce the earth, support personnel, device security by weld tabs, external metallization copper wire line.

The dustproof metal level (4) of waterproof ventilative material layer (3) and electromagnetic compatibility can be selected some commercially available waterproof, ventilative, dust-proof material for use, and its concrete choice criteria can be according to the degree of protection choose reasonable of equipment work needs.

Claims

1. waterproof and breathable earthing rod is characterized in that: it comprises double-screw bolt A (1), double-screw bolt B (2), waterproof ventilative material layer (3), the dustproof metal level (4) of electromagnetic compatibility, O RunddichtringO (5), nut (6), ground connection weld tabs (7), nut (8) and bullet pad (9); Double-screw bolt B (2) one ends are screw thread, and other end end face has a circular groove, and groove floor and end of thread end face form through hole, and through-hole aperture is less than the circular groove diameter; Waterproof ventilative material layer (3), the dustproof metal level (4) of electromagnetic compatibility are laid on the circular groove bottom surface in turn; Double-screw bolt A (1) one end is a screw thread, and 4 air-vents are arranged on the screw thread, and the diameter in hole is much smaller than the double-screw bolt diameter, and other end bottom surface has a through hole to link to each other with air-vent, and its end face diameter is greater than the end face diameter of double-screw bolt B (2); Double-screw bolt A (1) and double-screw bolt B (2) are carried out compression fit be pressed into, waterproof ventilative material layer (3), the dustproof metal level (4) of electromagnetic compatibility are fixed, and form circular groove at the end of double-screw bolt B (2); O RunddichtringO (5) is laid on the circular groove bottom surface, makes the end of thread and the installed surface of double-screw bolt A (1) airtight; Pack into the successively end of thread of double-screw bolt A (1) of ground connection weld tabs (7), bullet pad (9), nut (8); Pack into the end of thread of double-screw bolt B (2) of nut (6).